(19)

(11)

EP 4 031 751 A1

(12)

(43) Date of publication: 27.07.2022 Bulletin 2022/30 (21) Application number: 20716304.9 (22) Date of filing: 06.03.2020

(51) International Patent Classification (IPC):  F01D 11/12(2006.01) B01J 21/06(2006.01) C01G 23/04(2006.01) C04B 35/5831(2006.01) C23C 28/00(2006.01) C04B 35/20(2006.01) C04B 35/185(2006.01) C23C 14/08(2006.01) (52) Cooperative Patent Classification (CPC): F01D 11/122; F05D 2300/21; F05D 2300/2118; C23C 28/3455; F05D 2230/90; C04B 35/20; F05D 2300/6032; F05D 2240/11; F05D 2300/502; F05D 2300/506; F05D 2300/514; C23C 28/3215; C04B 35/185; F05D 2220/3219; C23C 28/324; C04B 35/46; C04B 35/22; C04B 35/111; C04B 35/119; C04B 35/486; C04B 35/462; C04B 2235/3227; C04B 2235/3272; C04B 35/583; C04B 2235/3232; C04B 2235/3463; C04B 2235/3472; C04B 2235/3427; C04B 2235/3208; C04B 2235/3201 (86) International application number: PCT/US2020/021567 (87) International publication number: WO 2021/055004 (25.03.2021 Gazette 2021/12)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 20.09.2019 US 201962903295 P (71) Applicant: Raytheon Technologies Corporation Farmington, CT 06032 (US)	(72) Inventors: STROCK, Christopher W. Kennebunk, Maine 04043 (US) SEYMOUR, Kevin C. Riviera Beach, Florida 33404 (US) (74) Representative: Dehns  St. Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)